As is known to us, theory is based on practice and servers practice. A. by chance B. in turn C. in return C. by turn
It was raining heavily. Little Mary felt cold, so she stood ___to her mother.
The managers, ____it clear to us that he didn’t agree with us, left the meeting room.
Some researchers believe that there is no doubt___ a cure for AIDS will be found.
.---Ow! I’ve burnt myself! ---How did you do that? ---I ____a hot pot.
I’d like to arrive 20 minutes early___ I can have time for a cup of tea.